$\displaystyle sin^2(3t)+cos^2(3t) = 1 ?$
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Originally Posted by zpwnchen $\displaystyle sin^2(3t)+cos^2(3t) = 1 ?$ Yes. (It's nothng more than the Pythagorean Identity).
you have to remember only one thing sin^2 x + cos^2 x = 1 you can replace by anything like 2x, 3x, Q, 2Q etc....It will always give you 1
Last edited by CaptainBlack; Oct 11th 2009 at 01:24 PM.
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